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130
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texts 130
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TOPIC
scientific american 72
scientific 71
patent 67
steam 67
heat 43
iron 42
tion 36
system technical 28
bell system 27
patent office 23
specific heat 19
steam engine 19
patents 18
power 18
consists 16
horse power 16
improved 16
claim 15
frequency 15
latent heat 15
heat sink 14
purpose set 14
electric 13
power supply 13
water 13
american 12
cast iron 12
combination 12
output 12
purposes set 12
wrought iron 12
center 11
circuit 11
letters patent 10
manner 10
steam boiler 10
address munn 9
amateur 9
amateur radio 9
american supplement 9
carbonic acid 9
energy 9
sewing machine 9
solar 9
feet 8
hot water 8
munn 8
price list 8
purpose 8
tbe 8
temperature 8
york city 8
antenna 7
hot air 7
renewable 7
renewable energy 7
solar energy 7
solar hot 7
system 7
battery 6
cable 6
constructed 6
device 6
electron 6
ham radio 6
heat loss 6
machine 6
magnetic 6
mhz 6
radio 6
sulphuric acid 6
technical journal 6
years ago 6
address 5
air 5
apparatus 5
arranged 5
circular 5
electronics 5
heat exchanger 5
heat transfer 5
input 5
loss 5
mode 5
modes 5
patented 5
systems 5
valve 5
waveguide 5
circuit board 4
circular electric 4
cubic feet 4
dielectric 4
free 4
free catalog 4
gas 4
gas engine 4
guide 4
heat units 4
high pressure 4
melting 4
railroad 4
red heat 4
small quantity 4
steam engines 4
sulphurous acid 4
thermal 4
tlie 4
toll free 4
voltage 4
american patent 3
amplifier 3
arc 3
color 3
cubic foot 3
electric light 3
express money 3
great deal 3
ham 3
heat sinks 3
heat treatment 3
ihe 3
impedance 3
inches 3
large number 3
lining thickness 3
magazine 3
magnetic field 3
melting point 3
ment 3
meter 3
piston 3
radiant heat 3
residents add 3
science fiction 3
science record 3
set 3
sheet metal 3
solar electric 3
solar heat 3
solar water 3
steam boilers 3
surface 3
thai 3
transfer 3
values 3
wind 3
wind generator 3
actor 2
adapted 2
alloys 2
ammonia 2
animal heat 2
antedated 2
antedated august 2
antedated march 2
antedated october 2
arrangement 2
artificial 2
artificial stone 2
asks 2
atomic 2
atoms 2
attenuation 2
barrel kit 2
bicycle 2
boiler 2
candle power 2
catalog 2
coaxial 2
coil 2
collector 2
copy scientific 2
cotton 2
cupola 2
current 2
december 2
design 2
diameter guide 2
dielectric lined 2
electric heat 2
electric wave 2
electrons 2
engine 2
equation 2
exhaust steam 2
feed water 2
feet long 2
field 2
front panel 2
hard disk 2
heat conduction 2
heat flow 2
heat pump 2
illustrated catalogue 2
intense heat 2
inventors 2
inverter 2
iron plates 2
james bond 2
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